Overview
- Getting a Reaction is a collection of four items related to chemistry. These drop from enemies in Metal Part I operations.
- The collection did also drop from the Batman Reward Cache during Batman Day 2024.

Collectibles
- " A collection of items that definitely do not belong in a home chemistry set."
Collectibles
Edit table| Diluted Strychnodide |
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| Cerberus in Metal Part I: False Idols |
Collectibles
Edit table| Prussic Acid Residue |
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| Mister Freeze in Metal Part I: Monsters of Metal |
Collectibles
Edit table| Advanced Chemical Reactions Textbook |
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| Large Loot Cache for weekly missions in Metal Gotham City |
Collectibles
Edit table| Damaged Trick Lapel Flower |
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| Mirror Master in Metal Part I: Scarlet Speedster |
Mail Messages
- Upon completion of this collection players receive a message from Oracle or Joker, accessible from any Mail Terminal.
- Heroes
- Villains
Mail Messages
Edit table| From: Oracle |
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| " Be careful with thi sstuff! The Joker has used this toxin to poison countless people. I don't know why you need it, but be sure to dispose of it properly." |
| Attachment: Joker Nanotoxin |
Mail Messages
Edit table| From: Joker |
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| " Why yes, yes, yes, of course you can borrow some of my gas! And I've made this batch special, just for you. Take a whiff! It's sure to put a smile on your face... Hahahahah!" |
| Attachment: Joker Nanotoxin |
Item
- This collection rewards the player with the Joker Nanotoxin catalyst item.
